Malicious PDF — malware analysis report

Static analysis result for SHA-256 410c419bfd427159…

MALICIOUS

PDF

32.5 KB Created: 2021-07-06 07:10:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6b3ffee286d32d651d79872305491a41 SHA-1: 6b9ec2129f7c1b9fde9a607bddad9486eeb5c085 SHA-256: 410c419bfd427159e89e490449ed0c5fe03773b822d85512b180b94790b2291a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, including a primary URL pointing to a 'hacked client' download. The heuristic firings indicate a link farm and a malicious ML classification, strongly suggesting a malicious intent to trick users into downloading malware. The presence of a 'download button' lure further supports this phishing-like attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/479516143/minecraft-windows-10-hacked-client-game-hack PDF link annotation
    • https://www.cgalgeria-dubai.com/userfiles/files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/new-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/robux-for-offers_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B13 21620 bytes
SHA-256: 35de7fe1aec796ed07a230174e56a7772082eee7a5efa64da555c143474e3fe7
font_01_sfnt_off00005a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A46 19056 bytes
SHA-256: cf25c1e073cb72c1ef0c5f26106c3c01589224d1b658977947a7aa510d1ce141